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Ajax callback in embedded html javscript

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    #1

    Ajax callback in embedded html javscript

    Hi,
    Is it possible to make an ajax callback in a javascript embedded on html page?

    <script>
    var myVar;
    var cnt = 0;
    function MonitorizeazaUser()
    {
    {dialog.Object}.ajaxCallback('','','InregistreazaActivitate','','');
    myVar = setInterval(MonitorizeazaUser, 5000);
    }
    </script>

    <%a5
    function InregistreazaActivitate as c (e as p)
    InregistreazaActivitate = "alert('wauuuu');"
    end function
    %>

    Thanks.
    Tags: None
    #2
    Re: Ajax callback in embedded html javscript

    Yes, but the example you show here assumes the presence of the dialog object, which of course you do not have. So, here's an example:

    Snippet from javascript:

    Code:
    		window.clearTimeout(SD);
		A5.ajax.callback('A5Callback.a5w','__action=CtResp&count='+$gvs('click_counter'));
		resetIt();
		alert('Tally has been recorded.');
    You'll see this calls an a5W page, which then contains this:

    Code:
    	<%A5
	....
	if __action = "CtResp"
		'__action=CtRep&observation_id=1&count=14
		Observer_Recorder(session.observation_id, count)
	end if
	....
	%>
    You can also envision from this that I have a single page -- named A5Callback.A5w -- to which I can refer all sorts of actions without having to rely on the presence of a dialog or grid component.
    -Steve
    sigpic

    Comment

      #3
      Re: Ajax callback in embedded html javscript

      Nice solution, Steve. I've made a dialog where I defined the xbasic function. The ux was embedded in html page and thus I could make the callback. But, your solution it is simplest and elegant. Where do you get these functions? In my a5 help does not exists.


      Thanks.

      Comment

        #4
        Re: Ajax callback in embedded html javscript

        Hi Steve,
        I have implemented your solution but I am not able to handle the callback.

        This code should set 'OK' value to a paragraph.
        <%a5
        dim ajaxResponse as c = "$svs('is_ok','OK');"
        ?ajaxResponse
        %>

        But instead of it show me text $svs('is_ok','OK'); on the page. I tried with an alert() and the same result.


        Thanks.

        Comment

          #5
          Re: Ajax callback in embedded html javscript

          Hey Catalin,

          What you're showing is running javascript inside XBasic tags... and that's ok... but you need a bit more in order to let the page know that you're running javascript... and that's the <script> tags.

          ?ajaxResponse is pushing out text to the DOM... so it just displays it. Wrapping the "text" in script tags tells the browser what to do with that text. In this case the text is javascript... so...

          Code:
          <%a5
dim ajaxResponse as c = "<script>$svs('is_ok','OK');</script>"
?ajaxResponse
%>
          Should work... you'd think... but looking even further you see that you're using an Alpha Javascript Core.JS Library function... so without a bit more code the above will fail because $svs is an unknown function.

          Code:
          <%a5
dim ajaxResponse as c = "<script>document.getElementById('is_ok').value='OK';</script>"
?ajaxResponse
%>
          Will work.

          If you add...

          Code:
          <script type="text/Javascript" src="Javascript/core.js"></script>
          into the <head> section of your page... then $svs will work.

          Comment

            #6
            Re: Ajax callback in embedded html javscript

            Hi David,
            I followed this sample http://wiki.alphasoftware.com/~alpha...+in+Alpha+Five
            But now I understand. Your explanation does not doubt.
            Even so does not works. I show you what I do:

            Code:
            <script>
var myVar;
var timeout = 25 * 1000;
var offset = 5 * 1000;
var first_time = true;

function MonitorizeazaUser() 
{
	/*Prima data la intrarea in pagina face callback apoi doar dupa ce expira timeout-ul*/
	if ((first_time) || (timeout <= 0))
	{
		first_time = false;
		/*Executa callback-ul actual doar daca callback-ul anterior a raspuns punand is_ok=OK*/
		if (document.getElementById("is_ok").innerHTML === 'OK')	
		{
			timeout = 25 * 1000;
			document.getElementById("is_ok").innerHTML = 'KO';
			A5.ajax.callback("header.a5w","");
		}	    		
	}
	else
	{
		timeout -= offset;	
	}		
}
</script>

<p id="is_ok" style="visibility:visible;">OK</p>

<%a5
	dim user as c = a5ws_getcurrentuser()
	debug(1)
	if user <> "" then	
		dim args as sql::arguments
		dim sql as c = <<%txt%
		INSERT INTO audit_user (
			IdUser, 
			RemoteIP, 
			Pagina, 
			HOST,
			Browser
			) VALUES (
			:IdUser, 
			:RemoteIP, 
			:Pagina, 
			:HOST,
			:Browser)
		%txt%
		args.add("IdUser", user)
		args.add("RemoteIP", Request.REMOTE_ADDR)
		args.add("Pagina", a5_split_url(Request.ServerVariables("URL")).page)
		args.add("HOST", Request.Host)
		args.add("Browser", Request.ServerVariables("http_user_agent"))	
		'if a5_split_url(Request.ServerVariables("URL")).page <> "header.a5w"	 
			ExecuteSQL_args(sql, args, 5)	
		'end if
	end if
	'dim ajaxResponse as c = "<script>$svs('is_ok','OK');</script>"
	dim ajaxResponse as c = "<script>document.getElementById('is_ok').value = 'OK';</script>"
	?ajaxResponse
%>
<body class="GrBlueModificatPage" onload="setInterval(MonitorizeazaUser, 5000);">

            Comment

              #7
              Re: Ajax callback in embedded html javscript

              I would like to know if it is possible to return a value from xbasic. Now I implemented another way to do that, but I would like to know.

              Thanks.

              Comment

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